A statement from the force earlier today said: "A number of lines of enquiry are being investigated.

"Officers are looking into possible sightings of Robin in the local area and CCTV footage is being examined.

"Officers are being assisted by volunteers from Leicestershire Search and Rescue as they search in local woodland as well as a body of nearby water.

"We would also appeal to anyone in the area who has private or commercial CCTV or dash-cam to check their footage from 7am on Monday 4 September onwards, and if you have captured images of a man fitting Robin’s description to get in touch."

Police issued this photograph after Robin Mills went missing from Fenny Drayton

Officers were unsure what Mr Mills had been wearing when he went missing but a statement said “he tends to wear clothing suited to the countryside”.

Speaking at an earlier stage of the investigation, Inspector Yakub Ismail from Leicestershire’s patrol and response unit, said: “Robin is unwell, he suffers from epilepsy and is heavily reliant on his medication which he has not taken with him.

“Officers and volunteers are working tirelessly to find Robin, but we would still ask the public to continue to share our appeals and to check any outbuildings on their properties or if you are driving in and around the area of Fenny Drayton to keep looking out for Robin or a man matching his description.

“As time goes on we are becoming increasingly concerned for his welfare.”